what if i want to want to convert a binary digit into an hexadecimal number and i dont know that number in decimal?

Hi Anshikasingh,

I don't remember seeing you before,  welcome to the forum :)

This is very easy

Take the base 2 number   10100111010110011111110000 

Split it into groups of 4 from the right hand side,

10  1001  1101  0110  0111  1111  0000 

in base 10 this would be a number between 0 and 15

In Hexidecimal it is a number between 0 and E

  $$10100111010110011111110000_2=$$    $$29D67E0_{16}$$

You would need to do more work to get the base 10 equivalent.